The video above shows the scene earlier this afternoon outside Upper Darby High School in suburban Philly. The footage was sent to us by a reader, and it looks and sounds like it was filmed by a student inside a classroom at the school. As the scene unfolds, the students watching from inside the school had no clue what was going on; they only knew what they could see: Police mysteriously dragging several naked people out of a van parked just outside.

According to the top cop, police learned the family arrived at Upper Darby High School approximately 10 a.m. to have her [sic] biological child released from school.

"Because she has no parental rights school officials would not release the child and said she couldn't take the child out of school," Chitwood said. "They started singing religious songs and lay prone on the sidewalk at the entrance to the building."

School district security ordered the family off the property and they returned approximately 1 p.m. and took off all their clothes.

"They disrobed between parked cars and were running around chanting prayers to Jesus," Chitwood said. "When police got there they locked their arms in defiant protest. When we get them back to the police station we gave them their clothes and the mom refuses to put her clothes on. She's the leader of the pack."

Arrested were Sara Butler, 43; her children Joanne, 23, and Bessie, 22; and a 14-year-old boy.